Re: Help with moving from Glassfish 4.1.1 to Oracle WebLogic Server 12.2.1.3.0

Hi Mark

I suspect you will find WebLogic is overkill for your needs, to be honest, my personal preference for ORDS is to use tomcat as the app server, its dead easy to get up and running (and the price is nicer too).

I'm not sure I entirely like LS' database/schema analogy, The relevant documentation is at
https://docs.oracle.com/cd/E21764_01/web.1111/e14140/intro.htm#WLDCW101 , but a WebLogic domain is a unit of administration for at least one, but potentially many different *instances *of WebLogic running on one or more physical servers. Each of those instances is a managed server running one or more J2EE applications. In the case of ORDS, you'll either need a single WebLogic server instance running both as an admin server and hosting the ORDS application, or if you want resilience to server failure then maybe you would create a WebLogic cluster in your domain. It's also worth reading up on node manager (
https://docs.oracle.com/cd/E21764_01/web.1111/e13740/overview.htm#NODEM113) if you have HA requirements and will be using multiple machines.

One thing I would say, whichever app server you choose, is that a single ORDS instance is perfectly capable of serving multiple databases - see https://docs.oracle.com/en/database/oracle/oracle-rest-data-services/19.1/aelig/configuring-REST-data-services.html#GUID-CC24128B-461A-4B8D-8722-7BD2D7E625BC for
example and it may well be that the capacity requirements for your applications don't require more than one or two application servers running ORDS. Obviously, you might have firewalls or geographic considerations that mean a single ORDS server (or a couple behind a load balancer) doesn't make sense.

On Thu, May 16, 2019 at 10:23 PM Mark J. Bobak <mark_at_bobak.net> wrote:

> Hi LS,
>
> Thanks again for the pointers. Do you know about Glasfish? Is a domain
> in WLS similar to a domain in Glassfish?
>
> Or is it more likely that a WLS managed server is like a domain?
>
> Ultimately, I need to deploy multiple 'ords.war' files, for different
> apps, configured to talk to different databases.
>
> So, do I create one domain, say 'base_domain', and create multiple managed
> servers under it, and deplpy an 'ords.war' into each managed server?
>
> Or have multiple domains, and deploy one 'ords.war' file per domain?
>
> Thanks!
>
> -Mark
>
> On Thu, May 16, 2019 at 3:58 PM Mark J. Bobak <mark_at_bobak.net> wrote:
>
>> Awesome, thanks!
>>
>> I'll check it out!
>>
>> -Mark
>>
>> On Thu, May 16, 2019 at 3:35 PM Ls Cheng <exriscer_at_gmail.com> wrote:
>>
>>> Hi Mark
>>>
>>> Quick explanation.
>>>
>>> After installation you have to create domains, during domain creation
>>> you can create managed server.
>>>
>>>
>>> https://docs.oracle.com/en/middleware/lifecycle/12.2.1.3/wldcw/creating-weblogic-domain.html#GUID-0806FAE0-74B4-4D28-A407-9C560CC8C009
>>>
>>>
>>> https://docs.oracle.com/en/middleware/lifecycle/12.2.1.3/asadm/scaling-your-environment.html#GUID-A8CF8AFE-7044-4162-83FD-DED75D3A05E7
>>>
>>>
>>> The domain is like database and managed server like a schema, in
>>> database terms. A default domain without any managed server creates by
>>> default the administration server, if you create new managed server are new
>>> weblogic instances.
>>>
>>> After domain and managed server creation you get these scripts
>>>
>>> $DOMAIN_HOME/bin/startWebLogic.sh ===> this starts the administration
>>> server
>>> $DOMAIN_HOME/bin/startManagedWebLogic.sh ===> this starts the managed
>>> server
>>>
>>> I learnt all when working with Forms & Reports :-)
>>>
>>> BR
>>>
>>>
>>>
>>>
>>> On Thu, May 16, 2019 at 9:25 PM Mark J. Bobak <mark_at_bobak.net> wrote:
>>>
>>>> Hi all,
>>>>
>>>> I've been working with APEX/ORDS/Glassfish for years, but recently, I
>>>> tried the latest version of Glassfish, 5.1.0, no longer under control of
>>>> Oracle, and was having a deployment error with ords.war. (Something about
>>>> CDI...?)
>>>>
>>>> Anyhow, I know latest version of ORDS still supports Glassfish, but
>>>> it's deprecated, and the days are numbered.
>>>>
>>>> So, I thought, no time like the present, let's try Oracle WebLogic
>>>> Server.
>>>>
>>>> So, first, while I'm quite comfortable with Oracle Database, I have
>>>> *zero* experience with Oracle WebLogic Server. So, I was poking round the
>>>> web, and I found this, which I downloaded:
>>>>
>>>> https://www.oracle.com/technetwork/middleware/weblogic/downloads/wls-main-097127.html
>>>>
>>>>
>>>> I managed to get it installed (I think), but I can't figure out what to
>>>> do, how to start it and start working with it. As I said, I have *no*
>>>> experience with WebLogic Server. FYI, when I indtsalled it, there weere
>>>> three options, "WebLogic",'Coherence", and "Complete with Examples", or
>>>> something like that. I installed the first option, "WebLogic".
>>>>
>>>> I found a document, which said to do 'startWebLogic.sh' to start it,
>>>> but I have no such file in my newly installed Oracle home.
>>>>
>>>> Can someone give me a clue, or possibly a link to some documentation
>>>> that will hold my hand and outline *exactly* what to do in which order?
>>>>
>>>> Thanks!
>>>>
>>>> -Mark
>>>>
>>>> PS I find this all very confusing, particularly the part about
>>>> WebLogic being part of Fusion Middelware? Anyhow, when you respond, please
>>>> do so as if I were a clueless idiot, because when it comes to WebLogic
>>>> Server, I pretty much am!
>>>>
>>>> PPS Yes, I'm finally back at work. I did work from home last week,
>>>> and this Monday, and I've been in the office since Tuesday. I'm still not
>>>> 100%, but I'm definitely feeling better.
>>>>
>>>

-- 
Niall Litchfield
Oracle DBA
http://www.orawin.info

--
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